Abstract
In this paper, Mg/Al laminated composites were successfully prepared at 400 °C by corrugated + flat rolling (CFR) with reduction ratios of 35% and 25% and subsequent annealing treatments were conducted at 200–350 °C for 30 min. A two-dimensional model was established to analyze the strain distribution during the first corrugated rolling process. Simulation results indicated that severe plastic deformation was formed at trough positions, which included more numerous refined grains than in the peak positions. The interfacial microstructure and mechanical property of the flattened composites along the rolling direction (RD) and the transverse direction (TD) were investigated. The results revealed that longitudinal discontinuous and transverse continuous interfacial intermetallic compounds (IMCs) were observed of the flattened as-rolled sample. Spatial distribution was provided for the grain microstructure along the thickness and rolling direction for AZ31B magnesium alloys of the CFR as-rolled composite. Mechanical property results showed that the longitudinal ultimate tensile strength (UTS) and elongation (EL) of the as-rolled sample reached 255 MPa and 4.14%, respectively. The as-rolled UTS along TD reached 325 MPa, about 30% higher than that along the RD. After heat treatment, the anisotropy of mechanical properties remained. The microstructure evolution and mechanical properties were discussed in detail.
Highlights
Bimetallic laminated composites have attracted much attention because of their excellent properties [1,2,3,4,5,6]
Luo [26] studied the longitudinal and transverse interfacial microstructure of Al/Mg/Al laminated composites after two-pass hot rolling. Their results indicated that the morphology of longitudinal and transverse interfacial microstructure is significantly different, while the specific reasons for this difference were not given in the study
Mg/Al laminated composites with the final thickness of 1.95 mm were successfully manufactured by the novel corrugated + flat rolling (CFR) method at reduction ratios of
Summary
Bimetallic laminated composites have attracted much attention because of their excellent properties [1,2,3,4,5,6]. Al/Mg/Al sheet rolled at 300 ◦ C with a 65% reduction ratio Among these methods, hot rolling is considered to be the most popular method for preparing Mg/Al laminated composites. Hot rolling is considered to be the most popular method for preparing Mg/Al laminated composites Problems, such as poor plate warpage and low bonding strength, still exist in the Mg/Al laminated composites. Shimoyama [25] analyzed the longitudinal and transverse tensile properties of AZ31 sheets prepared by periodical straining rolling. Luo [26] studied the longitudinal and transverse interfacial microstructure of Al/Mg/Al laminated composites after two-pass hot rolling. In the previous research [27], Cu/Al laminated composites with outstanding mechanical property have been prepared by the CFR process with a low reduction ratio of. A 2D model is established to analyze the strain distribution during the first corrugated rolling pass
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
